PyCAM generates toolpaths (GCode) for CNC machines out of 3D STL model files or 2D gravure contour files (SVG or DXF). The output of PyCAM can be imported into EMC2 or other machine controllers to direct the milling machine. PyCAM features different path generation strategies, cutter shapes, and post-processing options.

Malheur is a tool for the automatic analysis of malware behavior (program behavior recorded from malicious software in a sandbox environment). It is designed to support the regular analysis of malicious software and the development of detection and defense measures. It allows for identifying novel classes of malware with similar behavior and assigning unknown malware to discovered classes. It can be applied to recorded program behavior of various formats as long as monitored events are separated by delimiter symbols, e.g. as in reports generated by the popular malware sandboxes CWSandbox, Anubis, Norman Sandbox, and Joebox.

SLD Calculator is a GUI to calculate the characteristics of chemical compounds, especially the Neutron and X-Ray scattering length densities that are often required to know in scattering experiments. Furthermore, it offers internationalization support and is capable of switching the language at runtime.

libcfp analyzes and parses the syntax of a user-supplied chemical formula in ASCII notation. It does not know anything about the semantics of real world physical element characteristics. But it requires no external library dependencies and uses namespace std:: only. Furthermore, it uses UnitTest++ during development to ensure consistent behavior of formula parsing.

The OpenGDA project is a framework for creating customized data acquisition software for science facilities such as neutron and x-ray sources. It is Java-based with an embedded Jython interpreter. The framework allows hardware control directly or via third-party control systems.

Goptical is the GNU Optical design and simulation library.
It provides model classes for optical components, surfaces, and materials and enables building of optical systems by creating and placing various optical components in a 3D space and simulating light propagation through the system. Classical optical design analysis tools can be used on optical systems. It takes advantages of the C++ object model to allow the building of complex optical systems with a few class instantiations, as optical components are represented by language objects.

Date::Calc::XS is a Perl module that is the C/XS part which Date::Calc used to consist of. Date::Calc has become a (pure-Perl) wrapper which tries to load Date::Calc::XS, and failing that, loads Date::Calc::PP (a pure-Perl implementation which is now part of Date::Calc and used to be Date::Pcalc).